cUnbufferedFile Class Reference

#include <tools.h>

Public Member Functions
	cUnbufferedFile (void)
	~cUnbufferedFile ()
int	Open (const char *FileName, int Flags, mode_t Mode=DEFFILEMODE)
int	Close (void)
void	SetReadAhead (size_t ra)
off_t	Seek (off_t Offset, int Whence)
ssize_t	Read (void *Data, size_t Size)
ssize_t	Write (const void *Data, size_t Size)

Static Public Member Functions
static cUnbufferedFile *	Create (const char *FileName, int Flags, mode_t Mode=DEFFILEMODE)

Private Member Functions
int	FadviseDrop (off_t Offset, off_t Len)

Private Attributes
int	fd
off_t	curpos
off_t	cachedstart
off_t	cachedend
off_t	begin
off_t	lastpos
off_t	ahead
size_t	readahead
size_t	written
size_t	totwritten

Detailed Description

cUnbufferedFile is used for large files that are mainly written or read in a streaming manner, and thus should not be cached.

Definition at line 507 of file tools.h.

Constructor & Destructor Documentation

cUnbufferedFile()

cUnbufferedFile::cUnbufferedFile

(

void

)

Definition at line 1824 of file tools.c.

References fd.

Referenced by Create().

~cUnbufferedFile()

cUnbufferedFile::~cUnbufferedFile

(

)

Definition at line 1829 of file tools.c.

References Close().

Member Function Documentation

Close()

int cUnbufferedFile::Close

(

void

)

Definition at line 1852 of file tools.c.

References fd, and totwritten.

Referenced by Open(), and ~cUnbufferedFile().

Create()

cUnbufferedFile * cUnbufferedFile::Create ( const char * FileName, int Flags, mode_t Mode = DEFFILEMODE )

static

Definition at line 2004 of file tools.c.

References cUnbufferedFile(), and Open().

Referenced by cFileName::Open(), and cVideoDirectory::OpenVideoFile().

FadviseDrop()

int cUnbufferedFile::FadviseDrop ( off_t Offset, off_t Len )

private

Definition at line 1881 of file tools.c.

References FADVGRAN, and fd.

Referenced by Read().

Open()

int cUnbufferedFile::Open	(	const char *	FileName,
		int	Flags,
		mode_t	Mode = DEFFILEMODE )

Definition at line 1834 of file tools.c.

References ahead, begin, cachedend, cachedstart, Close(), curpos, fd, KILOBYTE, lastpos, readahead, totwritten, and written.

Referenced by Create().

Read()

ssize_t cUnbufferedFile::Read	(	void *	Data,
		size_t	Size )

Definition at line 1895 of file tools.c.

References ahead, cachedend, cachedstart, curpos, FadviseDrop(), fd, lastpos, max(), min(), readahead, READCHUNK, and safe_read().

Referenced by cRingBufferLinear::Read(), and ReadFrame().

Seek()

off_t cUnbufferedFile::Seek	(	off_t	Offset,
		int	Whence )

Definition at line 1887 of file tools.c.

References curpos, and fd.

SetReadAhead()

void cUnbufferedFile::SetReadAhead

(

size_t

ra

)

Definition at line 1876 of file tools.c.

References readahead.

Write()

ssize_t cUnbufferedFile::Write	(	const void *	Data,
		size_t	Size )

Definition at line 1953 of file tools.c.

References begin, curpos, fd, lastpos, max(), MEGABYTE, min(), safe_write(), totwritten, WRITE_BUFFER, and written.

Member Data Documentation

ahead

off_t cUnbufferedFile::ahead

private

Definition at line 515 of file tools.h.

Referenced by Open(), and Read().

begin

off_t cUnbufferedFile::begin

private

Definition at line 513 of file tools.h.

Referenced by Open(), and Write().

cachedend

off_t cUnbufferedFile::cachedend

private

Definition at line 512 of file tools.h.

Referenced by Open(), and Read().

cachedstart

off_t cUnbufferedFile::cachedstart

private

Definition at line 511 of file tools.h.

Referenced by Open(), and Read().

curpos

off_t cUnbufferedFile::curpos

private

Definition at line 510 of file tools.h.

Referenced by Open(), Read(), Seek(), and Write().

fd

int cUnbufferedFile::fd

private

Definition at line 509 of file tools.h.

Referenced by Close(), cUnbufferedFile(), FadviseDrop(), Open(), Read(), Seek(), and Write().

lastpos

off_t cUnbufferedFile::lastpos

private

Definition at line 514 of file tools.h.

Referenced by Open(), Read(), and Write().

readahead

size_t cUnbufferedFile::readahead

private

Definition at line 516 of file tools.h.

Referenced by Open(), Read(), and SetReadAhead().

totwritten

size_t cUnbufferedFile::totwritten

private

Definition at line 518 of file tools.h.

Referenced by Close(), Open(), and Write().

written

size_t cUnbufferedFile::written

private

Definition at line 517 of file tools.h.

Referenced by Open(), and Write().

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The documentation for this class was generated from the following files:

• tools.h
• tools.c